marker 4 the boundary changes direction towards middle marker 4/1.
middle marker 4/1 the boundary again changes direction towards middle
south we see middle marker 4/2 behind 4/1.
middle marker 4/2 the border makes an even more sharp turn. Middle marker
4/3 is at the birch in the background.
we can se middle marker 4/4 in the background.
the boundary follows the edge of the forrest (mm 4/4, 4/5, 4/6 and 4/7)
until it enter and passes through the forrest.
to the middle marker 4/2 we found an old DDR concrete border marker.